298 lines
8.9 KiB
Bash
298 lines
8.9 KiB
Bash
#!/bin/bash
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# 增强版进程资源监控脚本（基于PID）
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# 用法: ./pid_monitor.sh <进程PID> <监控时长(秒)>
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# 检查参数是否正确
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if [ $# -ne 2 ]; then
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echo "错误: 参数不正确!"
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echo "用法: $0 <进程PID> <监控时长(秒)>"
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exit 1
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fi
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TARGET_PID=$1
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DURATION=$2
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TIMESTAMP=$(date +%Y%m%d_%H%M%S)
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LOG_PREFIX="pid_monitor_${TARGET_PID}"
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DETAIL_LOG="${LOG_PREFIX}_detail_${TIMESTAMP}.log"
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SUMMARY_LOG="${LOG_PREFIX}_summary_${TIMESTAMP}.log"
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# 函数：检查进程是否存在
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check_process_exists() {
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local pid=$1
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if [ ! -d /proc/$pid ]; then
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return 1
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fi
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return 0
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}
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# 函数：获取进程基本信息
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get_process_info() {
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local pid=$1
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if [ -f /proc/$pid/status ]; then
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local process_name=$(cat /proc/$pid/comm 2>/dev/null || echo "N/A")
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local user=$(ps -o user= -p $pid 2>/dev/null || echo "N/A")
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local cmdline=$(cat /proc/$pid/cmdline | tr '\0' ' ' | head -c 100 2>/dev/null || echo "N/A")
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echo "$process_name" "$user" "$cmdline"
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else
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echo "N/A" "N/A" "N/A"
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fi
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}
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# 检查目标进程是否存在
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if ! check_process_exists $TARGET_PID; then
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echo "错误: 进程 PID $TARGET_PID 不存在!"
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exit 1
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fi
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# 获取进程基本信息
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read process_name process_user process_cmdline <<< $(get_process_info $TARGET_PID)
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echo "开始监控进程..."
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echo "进程PID: $TARGET_PID"
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echo "进程名称: $process_name"
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echo "运行用户: $process_user"
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echo "命令行: $process_cmdline"
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echo "监控时长: $DURATION 秒"
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echo "开始时间: $(date)"
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echo "详细日志: $DETAIL_LOG"
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echo "汇总报告: $SUMMARY_LOG"
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# 初始化日志文件
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echo "进程监控报告 - PID: $TARGET_PID" > $DETAIL_LOG
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echo "进程名称: $process_name" >> $DETAIL_LOG
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echo "运行用户: $process_user" >> $DETAIL_LOG
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echo "命令行: $process_cmdline" >> $DETAIL_LOG
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echo "开始时间: $(date)" >> $DETAIL_LOG
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echo "监控间隔: 1秒" >> $DETAIL_LOG
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echo "===============================================================" >> $DETAIL_LOG
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printf "%-20s %-8s %-8s %-12s %-12s %-12s\n" "时间戳" "CPU(%)" "内存(%)" "物理内存(MB)" "虚拟内存(MB)" "线程数" >> $DETAIL_LOG
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# 初始化统计变量
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COUNT=0
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CPU_SUM=0
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MEM_SUM=0
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RSS_SUM=0
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VSZ_SUM=0
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THREADS_SUM=0
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CPU_MAX=0
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MEM_MAX=0
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RSS_MAX=0
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VSZ_MAX=0
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THREADS_MAX=0
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# 函数：获取精确的CPU使用率[8](@ref)
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get_cpu_usage() {
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local pid=$1
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# 方法1: 使用top命令获取实时CPU使用率[1](@ref)
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local cpu_usage=$(top -bn1 -p $pid 2>/dev/null | awk -v pid=$pid '$1 == pid {print $9}')
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if [ -z "$cpu_usage" ]; then
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# 方法2: 通过/proc/stat计算[8](@ref)
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if [ -f /proc/$pid/stat ]; then
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# 获取进程CPU时间
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local utime=$(awk '{print $14}' /proc/$pid/stat)
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local stime=$(awk '{print $15}' /proc/$pid/stat)
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local total_time=$((utime + stime))
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# 获取系统启动时间
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local uptime=$(awk '{print $1}' /proc/uptime)
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local hz=$(getconf CLK_TCK)
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# 计算进程启动时间
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local starttime=$(awk '{print $22}' /proc/$pid/stat)
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local process_uptime=$(echo "$uptime - $starttime / $hz" | bc -l)
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if [ $COUNT -gt 0 ]; then
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local prev_total=$PREV_TOTAL
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local prev_seconds=$PREV_SECONDS
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local current_total=$total_time
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local current_seconds=$(echo "$uptime - $process_uptime" | bc -l)
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if [ $(echo "$current_seconds > $prev_seconds" | bc) -eq 1 ]; then
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cpu_usage=$(echo "scale=2; ($current_total - $prev_total) / ($current_seconds - $prev_seconds) / $hz * 100" | bc -l)
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fi
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PREV_TOTAL=$current_total
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PREV_SECONDS=$current_seconds
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else
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PREV_TOTAL=$total_time
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PREV_SECONDS=$(echo "$uptime - $process_uptime" | bc -l)
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fi
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fi
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fi
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echo ${cpu_usage:-0}
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}
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# 函数：获取内存信息[3,8](@ref)
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get_memory_info() {
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local pid=$1
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local mem_usage=0
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local rss_kb=0
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local vsz_kb=0
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local threads=0
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if [ -f /proc/$pid/status ]; then
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# 获取内存使用百分比[1](@ref)
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mem_usage=$(ps -o %mem= -p $pid 2>/dev/null || echo 0)
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# 获取RSS和VSZ[3](@ref)
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rss_kb=$(grep VmRSS /proc/$pid/status 2>/dev/null | awk '{print $2}' || echo 0)
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vsz_kb=$(grep VmSize /proc/$pid/status 2>/dev/null | awk '{print $2}' || echo 0)
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# 获取线程数[7](@ref)
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threads=$(ls /proc/$pid/task 2>/dev/null | wc -l || echo 1)
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fi
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# 转换为MB
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local rss_mb=0
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local vsz_mb=0
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if [ $rss_kb -gt 0 ]; then
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rss_mb=$((rss_kb / 1024))
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fi
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if [ $vsz_kb -gt 0 ]; then
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vsz_mb=$((vsz_kb / 1024))
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fi
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echo "$mem_usage" "$rss_mb" "$vsz_mb" "$threads"
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}
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# 主监控循环
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START_TIME=$(date +%s)
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END_TIME=$((START_TIME + DURATION))
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echo "开始监控进程 PID: $TARGET_PID ..."
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while [ $(date +%s) -lt $END_TIME ]; do
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CURRENT_TIME=$(date +%s)
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ELAPSED=$((CURRENT_TIME - START_TIME))
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REMAINING=$((DURATION - ELAPSED))
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if [ $REMAINING -le 0 ]; then
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break
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fi
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# 检查进程是否仍然存在
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if ! check_process_exists $TARGET_PID; then
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echo "警告: 进程 $TARGET_PID 在监控期间退出!"
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break
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fi
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TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
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# 获取CPU使用率
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CPU_USAGE=$(get_cpu_usage $TARGET_PID)
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# 获取内存信息
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read MEM_USAGE RSS_MB VSZ_MB THREADS <<< $(get_memory_info $TARGET_PID)
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# 记录到详细日志
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printf "%-20s %-8.1f %-8.1f %-12s %-12s %-12s\n" "$TIMESTAMP" $CPU_USAGE $MEM_USAGE "${RSS_MB}MB" "${VSZ_MB}MB" "$THREADS" >> $DETAIL_LOG
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# 更新统计信息
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CPU_SUM=$(echo "$CPU_SUM + $CPU_USAGE" | bc)
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MEM_SUM=$(echo "$MEM_SUM + $MEM_USAGE" | bc)
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RSS_SUM=$((RSS_SUM + RSS_MB))
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VSZ_SUM=$((VSZ_SUM + VSZ_MB))
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THREADS_SUM=$((THREADS_SUM + THREADS))
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# 更新最大值
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if [ $(echo "$CPU_USAGE > $CPU_MAX" | bc) -eq 1 ]; then
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CPU_MAX=$CPU_USAGE
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fi
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if [ $(echo "$MEM_USAGE > $MEM_MAX" | bc) -eq 1 ]; then
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MEM_MAX=$MEM_USAGE
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fi
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if [ $RSS_MB -gt $RSS_MAX ]; then
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RSS_MAX=$RSS_MB
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fi
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if [ $VSZ_MB -gt $VSZ_MAX ]; then
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VSZ_MAX=$VSZ_MB
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fi
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if [ $THREADS -gt $THREADS_MAX ]; then
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THREADS_MAX=$THREADS
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fi
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COUNT=$((COUNT + 1))
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# 进度显示
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if [ $((ELAPSED % 10)) -eq 0 ]; then
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echo "进度: ${ELAPSED}/${DURATION}秒, CPU: ${CPU_USAGE}%, 内存: ${MEM_USAGE}%, 物理内存: ${RSS_MB}MB"
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fi
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sleep 1
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done
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# 计算平均值
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if [ $COUNT -gt 0 ]; then
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CPU_AVG=$(echo "scale=2; $CPU_SUM / $COUNT" | bc)
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MEM_AVG=$(echo "scale=2; $MEM_SUM / $COUNT" | bc)
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RSS_AVG=$((RSS_SUM / COUNT))
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VSZ_AVG=$((VSZ_SUM / COUNT))
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THREADS_AVG=$((THREADS_SUM / COUNT))
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else
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CPU_AVG=0
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MEM_AVG=0
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RSS_AVG=0
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VSZ_AVG=0
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THREADS_AVG=0
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fi
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# 生成汇总报告
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echo "===============================================================" > $SUMMARY_LOG
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echo "进程监控统计报告" >> $SUMMARY_LOG
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echo "===============================================================" >> $SUMMARY_LOG
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echo "进程PID: $TARGET_PID" >> $SUMMARY_LOG
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echo "进程名称: $process_name" >> $SUMMARY_LOG
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echo "运行用户: $process_user" >> $SUMMARY_LOG
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echo "监控时长: $DURATION 秒" >> $SUMMARY_LOG
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echo "数据采样数: $COUNT 次" >> $SUMMARY_LOG
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echo "开始时间: $(date -d @$START_TIME)" >> $SUMMARY_LOG
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echo "结束时间: $(date)" >> $SUMMARY_LOG
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echo "" >> $SUMMARY_LOG
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echo "CPU使用率统计:" >> $SUMMARY_LOG
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echo " 平均值: $CPU_AVG%" >> $SUMMARY_LOG
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echo " 最大值: $CPU_MAX%" >> $SUMMARY_LOG
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echo "" >> $SUMMARY_LOG
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echo "内存使用率统计:" >> $SUMMARY_LOG
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echo " 平均值: $MEM_AVG%" >> $SUMMARY_LOG
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echo " 最大值: $MEM_MAX%" >> $SUMMARY_LOG
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echo "" >> $SUMMARY_LOG
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echo "物理内存(RSS)统计:" >> $SUMMARY_LOG
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echo " 平均值: ${RSS_AVG}MB" >> $SUMMARY_LOG
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echo " 最大值: ${RSS_MAX}MB" >> $SUMMARY_LOG
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echo "" >> $SUMMARY_LOG
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echo "虚拟内存(VSZ)统计:" >> $SUMMARY_LOG
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echo " 平均值: ${VSZ_AVG}MB" >> $SUMMARY_LOG
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echo " 最大值: ${VSZ_MAX}MB" >> $SUMMARY_LOG
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echo "" >> $SUMMARY_LOG
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echo "线程数统计:" >> $SUMMARY_LOG
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echo " 平均值: $THREADS_AVG" >> $SUMMARY_LOG
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echo " 最大值: $THREADS_MAX" >> $SUMMARY_LOG
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echo "" >> $SUMMARY_LOG
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# 屏幕输出总结
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echo ""
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echo "===== 监控完成 ====="
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echo "详细监控数据: $DETAIL_LOG"
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echo "统计报告: $SUMMARY_LOG"
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echo ""
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echo "监控统计摘要:"
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echo " - 数据采样数: $COUNT 次"
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echo " - CPU平均使用率: $CPU_AVG%"
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echo " - CPU最大使用率: $CPU_MAX%"
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echo " - 内存平均使用率: $MEM_AVG%"
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echo " - 内存最大使用率: $MEM_MAX%"
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echo " - 物理内存平均使用: ${RSS_AVG}MB"
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echo " - 物理内存峰值使用: ${RSS_MAX}MB" |